2,5-Dibromo-3,4-dimethyl-thiophene CAS 74707-05-4
| CAS No. | 74707-05-4 |
| Molecular Formula | C6H6Br2S |
| Molecular Weight | 269.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 2,5-Dibromo-3,4-dimethyl-thiophene (CAS 74707-05-4), a certified reference material (molecular formula C6H6Br2S, MW 269.98 g/mol) for analytical method development and quality control.
The molecular framework of 2,5-Dibromo-3,4-dimethyl-thiophene (C6H6Br2S) is characterized by sulfur-containing functionality, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H6Br2S |
| Molecular Weight | 269.98 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Br-containing |
| Sulfur Atoms | 1 |
Related Dibromo Standards
- 2,4-Dibromo-3,5-dimethylthiophene (CAS 63862-00-0)
- 2,5-Dibromo-3-ethylthiophene (CAS 53119-57-6)
- 3,4-Dibromo-2,5-dimethylthiophene (CAS 39129-54-9)
- 1,4-dibromo-2,5-dimethylbenzene (CAS 1074-24-4)
- 2,5-Dibromo-3-thiophenecarbaldehyde (CAS 1193-69-7)
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- 3,5-Dibromo-6-fluoropyridin-2-amine (CAS 1259477-39-8)
Recommended Standards
- 2-Bromo-5-(bromomethyl)-3-methylthiophene (CAS 1462380-09-1)
- 2-Bromo-5-(2-bromoethyl)thiophene (CAS 57070-74-3)
- 4-Bromo-2-(2-bromoethyl)thiophene (CAS 1343682-34-7)
- 2,3-Bis(bromomethyl)thiophene (CAS 13250-86-7)
- 3-Chloro-2-fluoro-5-methoxypyridine (CAS 1227574-55-1)
- 4-(3,4-Dichlorophenyl)-3-fluorobenzoic acid (CAS 1261914-12-8)
- Benzene, ethenyl-, polymer with 2-methyl-1-propene (CAS 9011-12-5)
- (3S,5S)-3,5-Diaminohexanoic acid (CAS 34281-55-5)
- H-Ile-NH2 ยท HCl (CAS 10466-56-5)
- 3-Methoxy-4-nitrobenzonitrile (CAS 177476-75-4)
- 6-Bromo-3-chloroquinoline-5-carbonitrile (CAS 2629318-39-2)
- 1-(3-Cyano-6-methoxyquinolin-4-yl)piperidine-4-carboxylic acid (CAS 1351819-53-8)
- (4-ethynylphenyl)boronic acid (CAS 263368-72-5)
- Des-Gly29,30-Tirzepatide (CAS CATO-CPTD788944)
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